Through Ruanda to Lake Kiwu 71 
a common but beautiful olive tree, Olea Hockstetteri Bak. If 
such a tree be looked at from the side or from below, it is seen 
that all the larger boughs, and even the larger branches, stand 
out quite distinct to the eye, all the minor foliage crowding itself 
together on the thinner branches at the periphery of the crown. 
The form of such a crown might be remotely compared with the 
inflorescence of an umbrella plant. To complete the picture 
mention must be made of the beard-moss on the crown, which, 
though appreciable, does not accumulate to the extent of giving 
the impression of ‘ dejected greybeards,’ as it does, according to 
Volkens, on the lofty trees of Kilimandscharo. 
“ For readers who are familiar with the African flora, the more 
important trees and tree-shrubs are here enumerated approximately 
to the frequency with which they are met: Olea Hockstetteri 
Bak., Macaranga kilimandscharica Pax, Syzygium farvifolium 
Engl., Olinia V olkensii Gilg., Cara fa grandiflora Dawe et 
Sprague, Neoboutonia macrocalyx Pax, Psychotria ficoidea K. 
Krause, Galiniera coffeoides Del., Xymalos usambarensis Engl., 
Bersama sfec., Polyscias polybotrya Harms., Cornus Volkensii 
Har7ns., Ochna densiconia Engl, et Gilg. Syrnphonia globulifera 
var. africana Vesque (more on the margin than in the deeper parts 
of the forest), Peddiea Fischeri Engl., Nuxia usambarensis Gilg., 
Rapanea pidchra Gilg., Pygemn africanwn Hook f., Maesa 
Mildbraedii Gilg., and finally Hagenia abyssinica, Agauria 
salicifolia Hook Ilex mitis (T) Radik, var. kilimandscharica 
Loes., which prefer the forest clearings. The following were 
observed only to the west of the watercourse: Podocarpus 
usambarensis Pilger, P. spec., Parinarium Mildbraedii Engl. 
We also collected towards the west of the forest Ericacece 
Ficalhoa usambarensis Engl., and amongst sparsely growing 
vegetation Faurea usambarensis Engl. This find was very 
interesting from a botanical-geographical point of view, as 
hitherto it has only been encountered in Angola. 
“Although the forest, as seen from above, bears quite a differ¬ 
ent appearance from the forests of Germany, it has a still more 
unfamiliar aspect when viewed from the interior. There is nothing 
